Voltage detector



FIG. 1 is a front view of a voltage detector showing the new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front, top, and right side perspective view thereof.

The broken lines depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a voltage detector, as shown and described. 